Title (en)

A PROCESS AND DEVICE FOR THE VAPORIZATION INJECTION OF LIQUID SAMPLES IN GAS CHROMATOGRAPHIC ANALYSIS APPARATUSES

Publication

EP 0461438 A3 19920819 (EN)

Application

EP 91108334 A 19910523

Priority

IT 2060590 A 19900611

Abstract (en)

[origin: EP0461438A2] A process for the introduction of a liquid sample into an apparatus for gas chromatographic analysis, of the type wherein said sample is injected into a vaporization chamber positioned upstream a gas chromatographic column, equipped with means to feed a carrier gas and kept at a temperature at least equal to the boiling temperature of the solvent at the operating pressure, provides to: cut off or partialize the carrier gas flow entering said chamber; evaporate at least partly the introduced sample; cause the resulting vapours to flow from the injection/evaporation position to a second exhaust position; perform an at least partial separation between solvent and sample components in the vapours thus obtained during said flow; exhaust said partially separated vapours from said chamber; close or partialize said exhaust and restore the carrier gas feeding sending to the column the sample portion remained in said column (figure 1). <IMAGE>

IPC 1-7

G01N 30/12

IPC 8 full level

G01N 1/00 (2006.01); G01N 30/12 (2006.01); G01N 30/10 (2006.01); G01N 30/30 (2006.01); G01N 30/40 (2006.01)

CPC (source: EP US)

G01N 30/12 (2013.01 - EP US); G01N 1/22 (2013.01 - EP US); G01N 30/10 (2013.01 - EP US); G01N 30/40 (2013.01 - EP US); G01N 2030/3046 (2013.01 - EP US)

Citation (search report)

• [X] US 3859209 A 19750107 - JAHNSEN VILHELM J, et al
• [A] FR 2206858 A5 19740607 - RAFFINAGE CIE FRANCAISE [FR]
• [A] DE 3729891 A1 19890323 - FUELLING RAINER DR [DE]
• [AD] DE 3504130 A1 19860807 - FUELLING RAINER DR
• [AD] JOURNAL OF CHROMATOGRAPHY. vol. 295, 1984, AMSTERDAM NL pages 49 - 54; K. GROB ET AL: 'Concept for the sampling and derivatization of penta-chlorophenol from air in a capillary pre-column, followed by gas chromatographic determination'
• [AD] JOURNAL OF CHROMATOGRAPHY. vol. 174, 1979, AMSTERDAM NL pages 437 - 439; W. VOGT ET AL: 'Sampling method in capillary column gas-liquid chromatography allowing injections of up to 250 microliter'
• [A] JOURNAL OF HIGH RESOLUTION CHROMATOGRAPHY AND CHROMATOGRAPHY vol. 13, no. 06, 1 June 1990, HEIDELBERG DE pages 405 - 409; E. DOLECKA ET AL: 'Variable splitter for regulation of the solvent evaporation rate in the coupling of liquid chromatography with gas chromatography'

Designated contracting state (EPC)

CH DE FR GB LI NL

DOCDB simple family (publication)

EP 0461438 A2 19911218; EP 0461438 A3 19920819; EP 0461438 B1 19961016; DE 69122664 D1 19961121; DE 69122664 T2 19970306; IT 1248721 B 19950126; IT 9020605 A0 19900611; IT 9020605 A1 19911211; US 5174149 A 19921229

DOCDB simple family (application)

EP 91108334 A 19910523; DE 69122664 T 19910523; IT 2060590 A 19900611; US 70436691 A 19910523